XML 38 R75.htm IDEA: XBRL DOCUMENT v2.4.1.9
Long-Term Debt (Debt Redemptions) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Debt Instrument, Redemption [Line Items]  
Extinguishment of debt $ 837us-gaap_ExtinguishmentOfDebtAmount
Mortgages [Member] | March 2014 Mortgage Bonds Various Interest Rates Maturing in 2014 [Member]  
Debt Instrument, Redemption [Line Items]  
Extinguishment of debt 13us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_DebtInstrumentAxis
= dteelectric_March2014MortgageBondsVariousInterestRatesMaturingin2014Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MortgagesMember
Securitization Bonds [Member] | March 2014 Securitization Bonds 6.62% Maturing in 2014 [Member]  
Debt Instrument, Redemption [Line Items]  
Debt instrument stated interest rate 6.62%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= dteelectric_March2014SecuritizationBonds6.62Maturingin2014Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_SecuritizationBondsMember
Extinguishment of debt 100us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_DebtInstrumentAxis
= dteelectric_March2014SecuritizationBonds6.62Maturingin2014Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_SecuritizationBondsMember
Securitization Bonds [Member] | September 2014 Securitization Bonds 6.62% Maturing in 2014 [Member]  
Debt Instrument, Redemption [Line Items]  
Debt instrument stated interest rate 6.62%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= dteelectric_September2014SecuritizationBonds6.62Maturingin2014Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_SecuritizationBondsMember
Extinguishment of debt 96us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_DebtInstrumentAxis
= dteelectric_September2014SecuritizationBonds6.62Maturingin2014Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_SecuritizationBondsMember
Tax Exempt Revenue Bonds [Member] | April 2014 Tax Exempt Revenue Bonds 2.35% Maturing in 2024 [Member]  
Debt Instrument, Redemption [Line Items]  
Debt instrument stated interest rate 2.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= dteelectric_April2014TaxExemptRevenueBonds2.35Maturingin2024Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_TaxExemptRevenueBondsMember
Extinguishment of debt 31us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_DebtInstrumentAxis
= dteelectric_April2014TaxExemptRevenueBonds2.35Maturingin2024Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_TaxExemptRevenueBondsMember
Tax Exempt Revenue Bonds [Member] | April 2014 Tax Exempt Revenue Bonds 4.65% Maturing in 2028 [Member]  
Debt Instrument, Redemption [Line Items]  
Debt instrument stated interest rate 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= dteelectric_April2014TaxExemptRevenueBonds4.65Maturingin2028Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_TaxExemptRevenueBondsMember
Extinguishment of debt 32us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_DebtInstrumentAxis
= dteelectric_April2014TaxExemptRevenueBonds4.65Maturingin2028Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_TaxExemptRevenueBondsMember
Tax Exempt Revenue Bonds [Member] | June 2014 Tax Exempt Revenue Bonds 4.875% Maturing in 2029 [Member]  
Debt Instrument, Redemption [Line Items]  
Debt instrument stated interest rate 4.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= dteelectric_June2014TaxExemptRevenueBonds4.875Maturingin2029Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_TaxExemptRevenueBondsMember
Extinguishment of debt 36us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_DebtInstrumentAxis
= dteelectric_June2014TaxExemptRevenueBonds4.875Maturingin2029Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_TaxExemptRevenueBondsMember
Tax Exempt Revenue Bonds [Member] | June 2014 Tax Exempt Revenue Bonds 6.00% Maturing in 2036 [Member]  
Debt Instrument, Redemption [Line Items]  
Debt instrument stated interest rate 6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= dteelectric_June2014TaxExemptRevenueBonds6.00Maturingin2036Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_TaxExemptRevenueBondsMember
Extinguishment of debt 69us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_DebtInstrumentAxis
= dteelectric_June2014TaxExemptRevenueBonds6.00Maturingin2036Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_TaxExemptRevenueBondsMember
Tax Exempt Revenue Bonds [Member] | August 2014 Tax Exempt Revenue Bonds 5.25% Maturing in 2029 [Member]  
Debt Instrument, Redemption [Line Items]  
Debt instrument stated interest rate 5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= dteelectric_August2014TaxExemptRevenueBonds5.25Maturingin2029Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_TaxExemptRevenueBondsMember
Extinguishment of debt 60us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_DebtInstrumentAxis
= dteelectric_August2014TaxExemptRevenueBonds5.25Maturingin2029Member
/ us-gaap_LongtermDebtTypeAxis
= dteelectric_TaxExemptRevenueBondsMember
Senior Notes [Member] | July 2014 Senior Notes 4.80% Maturing in 2015 [Member]  
Debt Instrument, Redemption [Line Items]  
Debt instrument stated interest rate 4.80%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= dteelectric_July2014SeniorNotes4.80Maturingin2015Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
Extinguishment of debt 200us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_DebtInstrumentAxis
= dteelectric_July2014SeniorNotes4.80Maturingin2015Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
Senior Notes [Member] | August 2014 Senior Notes 5.40% Maturing in 2014 [Member]  
Debt Instrument, Redemption [Line Items]  
Debt instrument stated interest rate 5.40%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= dteelectric_August2014SeniorNotes5.40Maturingin2014Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
Extinguishment of debt $ 200us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_DebtInstrumentAxis
= dteelectric_August2014SeniorNotes5.40Maturingin2014Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember